In the event that you are informed of unusual signs on your vehicle, you are right to be concerned, because a car represents a huge annual budget and sudden malfunctions don’t reduce the expenses. So what if you think that you have a leaking injector on your Nissan Pulsar? You likely figured it out thanks to black/oily drips along your engine, or a troubled idle, or strange black smoke. These three signs of illness are the main signals of a leaking injector. As this problem can end up in more significant engine complications on your car, we made a decision to publish this article to help you verify the failure of a leaking injector and deal with it properly. To achieve this, we will first look at the case of gasoline injectors and then at those of diesel injectors Nissan Pulsar.
Leaking injector on my petrol Nissan Pulsar
It is essential to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two sort of engines makes the injection different. The essential difference lies in the pressure undergone by the injectors, on a petrol engine it will vary between 3.5 bars for indirect injection and 120 bars for indirect injection.
Leaking injector on a petrol Nissan Pulsar: The different leaks
It should be mentioned that injector leaks on a Nissan Pulsar equipped with a petrol engine are pretty rare. This is caused by the much lower pressure in the petrol intake systems. Nevertheless, there are two sort of leaks:
- Leakage from the top of the injector:
It is conceivable that you have a leak from the top of the injector, this is the component that is attached to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may suffer a leak coming from the lower portion of the injector of your car, this one will come from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Nissan Pulsar
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system generates very high pressure in the engine, as do the injectors. On these models, the pressure is more than 10 times higher than on the direct injection of car petrol engines, reaching 1800 to 2000 bars.
Leaking injector on diesel Nissan Pulsar: The different leaks
In the case of leaking diesel injectors on your Nissan Pulsar, there are three several sort of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform over time, usually the leak will be at the clamping point. - Injector return leakage:
As its name implies, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Nissan Pulsar will be brought on by an O-ring or its plastic tip that leaks. - Injector base leak:
This injection leak is one of the most annoying, it is the junction between the engine and the injector nose that leaks at a copper seal, you should find an air noise and a compression loss. - If after verifying you have oil leaking but it does not come from your injectors, we advise you to read this article on the presence of oil leaking on your Nissan Pulsar.
Leaking injector on my Nissan Pulsar, how to fix the leak
And to finish, we’re going to look at how to fix a leaking injector on your car. Frequently a leak is linked, as we have seen previously, to a worn seal caused by the pressures suffered. But think that the pressure in the circuit is monumental, especially on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is done…
- Covering you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Relating to the repair part of your leak, it will frequently be restricted to changing the seals that have failed:
- Identify the source of the leak
- Take apart the injector in question
- Replace the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in respect with the manufacturer’s standards.
In all cases, these interventions are not necessarily difficult, but if you have the slightest doubt in the treatment of your injector that leaks on your Nissan Pulsar, we advise you to get closer to your motor mechanic to avoid any bad handling that could seriously harm the condition of your Nissan Pulsar.
If perhaps you have any further questions about the Nissan Pulsar, do not hesitate to consult our Nissan Pulsar category.
